MIDLAND — Kent Matthes hit a ninth-inning grand slam off Luis De La Cruz, erasing all of what had been a 3-0 deficit as the RockHounds posted their eighth straight win over the Missions on Friday night in front of 4,424 at Security Bank Ballpark.

It was the second straight night the Missions blew a ninth-inning lead after doing so once all season. It was Midland's sixth walk-off win over the Missions, with four coming in their last five meetings.

Josh Geer turned in seven solid innings of three-hit shutout ball and looked poised to improve his career record at Midland to 7-0.

Rymer Liriano slugged his 14th home run of the season to open the scoring, and the Missions added runs in the fifth and the ninth to take a 3-0 lead.

De La Cruz allowed all five runs in the ninth as the Missions fell 51/2 games back of Midland in the second-half standings of the Texas League South Division.

Notebook: Midland is riding its longest winning streak against the Missions since capturing nine straight in 2000.